Frequency multiplier



May 7, 1929. MEISSNER 1,712,046

FREQUENCY MULTIPLIER Filed Feb. 26, 1924 avwento'z ALEXANDER MEiSSNER@351 his alien? Patented May 7,- 1929.

UNITED STATES.

PATENT. oFFrcs.

Ammonia miIssNEn, or BERLIN, GERMANY, nssrenon 'ro ensnnnscnm rim'DRAHTLOSE rnnnennrnm 1!. B. 11,01 BERLIN, GERMANY, A conronnrron orGERMANY.

FREQUENCY munrrrnrnn.

Application filgd February 26, 1924, Serial No. 695,165,:12101 inGermany April 20, 1923.

My invention relates to arrangements for deriving a current of a higherfrequency sideration with the accompanying drawing,

in which:

Fig. 1 shows a schematic connection embodying the invention.

Fig. 2 shows some curves, explaining the operation of the invention.

A radio frequency generator 1, a self-inducta'nce 2 and a capacitance 3composed of condensers 4 and 5 form a circuit l tuned to the generatorfrequency? The electric brush discharge device 8 consisting of points orthin wires is connected in parallel to 8. Circuit II consisting ofcondensers 3 and 6 and inductance 7 is tuned to the desired harmonic andso dimensioned'that it does not considerably disturb the syntonyofcircuit 1.

if new the generator voltage is so much increased that the voltageacross it exceeds the voltage V, necessary to cause a. brush dischargein the discharge device 8, the voltage curve assumes the truncatedshapeinstead of the sine-shape a (Figure 2), the wave a representing thevoltage that would be obtained across the condenser 3 the dischargedevice 8 were not present. Such a curve, as is well known, can heanalyzed into the fundamental 0 and one harmonic ti, or more, of a ratioof amplitudes which depends on the ratio of the discharging voltage V,to the voltage V which would be attained if no Theadvanta oi-this methodis above all,

the great simp cityf-ofthe frequency multiplying device, theabsence ofiron, for

iron always reqniresan expensivecooling' a1:- I

brush discharge occurred. Useful energy of rangement in the case oflarger transmitters.

Here the energy losses, which always accom- 5 pany frequencymultiplying, occur in the air I and are carried away by simpleair-cooling. As shown in Fig. 1 the circuit may be grounded, and yet besymmetrical, by groiugid ng at a point between condensers 4 an It willbe appreciated that my invention is not limited to the embodimentsdescribed above, but that I am entitled to all modifications thereof asfairly come within the scope of the following claims.

Having described my invention I claim; 1. An arrangement for multiplyingfrequency comprlsing a source of alternating current, a circuit tuned,to the frequency of, to

and coupled to, saidsource, a second circuit tuned to a harmonic of saidsource, brushdischarge means common to both circuits for deforming thewave from said source so that the said harmonic is obtained in thesecond tuned circuit.

2. A frequency multiplier comprising a first circuit tuned to a lowerfrequency and including a capacitance, a second circuit coupled to thefirst circuit and tuned to a higher to frequency which is a harmonic ofthe lower frequency, and means common to said circuits for producing theharmonic from the lower frequency comprising the aforesaid capacitanceand abrush discharge gap conso nected in parallel therewith.

S. A frequency multiplier comprising a circuit containing a source ofalternating current, a second circuit tuned to a harmonic of the sourcefrequency, a brush discharge gap common to the two circuits, fordeforming the source wave so that harmonics thereof can be resonated outby the tuned circuit.

i. A frequency multiplier comprising a sourceof fundamental frequency, acircuit tuned to a harmonic thereof, and a harmonic I generatorincluding a brush discharge device adjusted-to discharge at a potentialless than the maximum potential of the energy of fundamental fre uency.p

. EXANDEB MEISSNER.

